Re: What causes color mapping error?
Re: What causes color mapping error?
- Subject: Re: What causes color mapping error?
- From: email@hidden (Lee Blevins)
- Date: Tue, 21 Nov 2000 19:51:42 -0500
- Organization: Digital Graphics, Inc.
>
>When we do a profile to profile in pshop it doesn't work. In fact, it's
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>quite a bit off.
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Profile to profile will not offer an accurate preview, as it is previewing
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from the wrong CMYK space. Instead select the profile as your CMYK default,
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and do a menu conversion from RGB to CMYK. That will offer an accurate
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Relative Colorimetric or Perceptual preview. Or get PS6 and use the proofing
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feature to get Absolute Colorimetric return, showing the paper white and ink
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black in the proof.
Here's what we're doing.
1) Create profile of print condition #1.
2) Create profile of print condition #2.
3) Print file on #1 as is.
4) P2P file in Pshop 5.5 with a 1 to 2 conversion.
5) Print file on print condition #2.
Match couldn't be further off.
The problem is the shadows are lightened.
We can see this if we try this.
1) Create a 4x100 to 4x0 gray scale in Pshop. (CMYK)
2) P2P in Pshop 5.5 from CMYK space to RGB space.
The shadow is lightened by quite a margin.
The 4x100 become all 50's and 60's.
Why is this?
Even if we profile two (nearly identical) cmyk printers and to a P2P
(cmyk to cmyk) the image gets whacked. the 4x100 shadows become
something like 56,54,57,62.
The resulting print is so far off I couldn't give it away.
We're using Kodak Colorflow.
Would using a different system change this?